Try in restart your computer again and then check for windows updates. Check device manager for showing sound or not? If this not works...
Scan your computer for system file checker, Open PowerShell as Admin and write "sfc /scannow" and hit enter. This will scan your computer for errors and integrity violations. When complete restart your computer. Hoping your problem will be solved. If this also not works...
Open PowerShell as Admin and write "Dism.exe /Online /Cleanup-Image /RestoreHealth" hit enter wait till this completes and then restart your computer, upon restart hoping definitely your problem will be solved...